Graffiti Overlay

Hi everyone,
I need an overlay that looks like its been spray painted. In my story my character is pulling a prank on the school by spray painting the lockers. So something funny and cool, not preppy. Thanks

And also, can anyone tell me how to just make the overlay appear? I dont want it appearing immediately on the background

I can’t make the overlay, but the command is &overlay NAME opacity % in x
The % is a value 0 to 1 and x is time

ok thanks